A new model for dynamic analysis of side mounted diffuser valve micropumps

M. T. Ahmadian, Amin Mehrabian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Valveless micropumps are widely used due to simple structure, durability and low maintenance. Understanding the fluid-membrane interaction and performance criteria is still a challenging problem for the scientists. In this work, a new model for side mounted valve micropumps is developed to obtain dynamic response of micropump with respect to piezoelectric actuation. The parameters of this model are obtained in terms of actuation frequency and geometrical dimensions of the micropump. Balancing elastic, inertial and damping forces result in the governing equation of the micropump system model. Analytical studies for the bottom mounted valve micropump indicate pump flux is independent of the chamber geometrical aspect ratio while, for the side mounted valve micropumps, geometric aspect ratio is an important factor in the net flux. Findings indicate there exists a peak excitation frequency at which the flux is maximum. As the excitation frequency increases beyond the peak frequency, the pump flux decreases sharply. This is due to enhancement of the fluid inertial forces. By increasing the aspect ratio of the chamber the maximum net flux raises considerably. While, increasing membrane to valve area ratio has adverse effect on the pump efficiency. Findings show that good agreement exists between the net flux response to actuation frequency obtained from modeling and experiment.

Original languageEnglish (US)
Title of host publicationProceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA 2006
StatePublished - Dec 1 2006
Event8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006 - Torino, Italy
Duration: Jul 4 2006Jul 7 2006

Publication series

NameProceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006
Volume2006

Other

Other8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006
CountryItaly
CityTorino
Period7/4/067/7/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Ahmadian, M. T., & Mehrabian, A. (2006). A new model for dynamic analysis of side mounted diffuser valve micropumps. In Proceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA 2006 (Proceedings of 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006; Vol. 2006).